Re: Expansing macro-definitions using Gdb

[Jim Blandy <jimb@redhat.com>]

Pierre Habraken <Pierre.Habraken@imag.fr> writes:
> The Gcc man page tells that using the option -g3 macro-definitions
> present in the source program are included into the object file.
> However, even when I use this option at compile time, Gdb 5.2 does not
> recognize such macro-definitions.
> Actually, using gcc 3.04, I compiled a C program including macro
> definitions first with option -g and then with option -g3. Then, when
> using cmp to compare both executables no difference is detected.
> Is there a way to enable printing/displaying macro-definitions when
> debugging a C program with Gdb ?

Macro support was added after 5.2.  To get preprocessor macro support,
you'll need to get the latest GDB sources.

For the compiler, you'll need to use Dwarf 2 debugging information.
Try -gdwarf-2 -g3.